整合ssha的WEB小项目,J2EE入门程序

package dao; import java.util.Iterator; import java.util.List; import model.User; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.Query; import org.hibernate.Session; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; /** * A data access object (DAO) providing persistence and search support for User * entities. Transaction control of the save(), update() and delete() operations * can directly support Spring container-managed transactions or they can be * augmented to handle user-managed Spring transactions. Each of these methods * provides additional information for how to configure it for the desired type * of transaction control. * * @see model.User * @author MyEclipse Persistence Tools */ public class UserDAO extends HibernateDaoSupport implements IUserDao { Session session = null; private static final Log log = LogFactory.getLog(UserDAO.class); protected void initDao() { // do nothing } public List listAll() { List list = null; session = this.getSession(); list = session.createQuery("from User").list(); session.close(); return list; } public void addUser(User dto) { session = this.getSession(); session.beginTransaction(); try { session.save(dto); session.beginTransaction().commit(); // getSession().beginTransaction().commit();//这种不行 } catch (Exception e) { e.printStackTrace(); } finally { session.close(); } } // 当用户名字段不是主键的时候 不能用user = (User) session.get(User.class, username)方式判断 public User findByUserName(String username) { session = this.getSession(); User user = null; try { //user = (User) session.createQuery("from User where username='" + username + "'").list().get(0); //下面的方法优于上面的 Query q = session.createQuery("from User where username='"+username+"'"); List list = q.list(); Iterator it = list.iterator(); while(it.hasNext()){ user = (User)it.next(); } } catch (Exception e) { e.printStackTrace(); } finally { session.close(); } return user; } public User findByUserID(int id) { session = this.getSession(); User user = null; try { user = (User) session.get(User.class, id); } catch (Exception e) { e.printStackTrace(); } finally { session.close(); } return user; } public boolean isLogin(String username, String password) { User user = findByUserName(username); if (user != null) { if (password.equals(user.getPassword())) return true; } return false; } }